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Finding the Fourth Proportional to 8,601.20, 11,869.79 and 4,825.20

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Solution

The fourth proportional to 8,601.20, 11,869.79 and 4,825.20 is: 6,658.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,601.20 : 11,869.79 = 4,825.20 : x
  2. Step 2: Convert to fraction form
    8,601.20/11,869.79 = 4,825.20/x
  3. Step 3: Cross multiply
    8,601.20x = 11,869.79 × 4,825.20
  4. Step 4: Simplify right side
    8,601.20x = 57,274,086.58
  5. Step 5: Solve for x
    x = 57,274,086.58/8,601.20
  6. Step 6: Final answer
    x = 6,658.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.